RECON: TNO occultation with 531017

Event between (531017) 12BA155 and star GA0840:03924297 with event index number of 2439534

Geocentric closest approach at 2022/03/25 09:06:27 UTC

J2000 position of star is 10:26:33.1 -04:56:29
Equinox of date position of star is 10:27:40.0 -05:03:15
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 38.2 AU from the Sun and 37.3 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 93 seconds.
The 1-sigma cross-track error in the shadow position is 1591 km.
The sky-plane scale is 27028.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=356.5 km assuming a 5% albedo -- 15.9 sec chord
Diameter=145.5 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 531017, (2022/03/25 09:09UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:33.2 +11:51:28  1.3 17.50 127
Alphard        09:28:40.8 -08:45:22  2.0 15.10 124
25 Sex         10:24:33.9 -04:11:13  6.0  1.16 116
PPM 193425     10:27:54.3 -04:30:08  6.6  0.56 115
PPM 193414     10:27:19.0 -04:56:44  9.6  0.14 115
531017         10:27:40.4 -05:03:18 15.9       114
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 5.0 sigma about the mid-time.
The median site spacing is 8.6 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:06:17 -30.7 Dark Down 15.5 239.9 Really Low 08:58:00 - 09:14:34 10989
Kamloops 09:06:39 -36.0 Dark Down 23.5 227.2 Low 08:58:22 - 09:14:56 10685
Kelowna 09:06:33 -36.5 Dark Down 23.7 228.3 Low 08:58:16 - 09:14:50 10684
Peachland 09:06:32 -36.7 Dark Down 23.9 228.0 Low 08:58:15 - 09:14:49 10674
Penticton 09:06:31 -36.9 Dark Down 23.9 228.3 Low 08:58:14 - 09:14:48 10672
Summerland 09:06:31 -36.8 Dark Down 23.9 228.2 Low 08:58:14 - 09:14:48 10672
Anarchist Mountain Observatory 09:06:29 -37.3 Dark Down 24.2 228.7 Low 08:58:12 - 09:14:46 10663
Oliver 09:06:30 -37.2 Dark Down 24.2 228.4 Low 08:58:13 - 09:14:47 10662
Dunrhomin 09:05:26 -39.9 Dark Up 20.8 243.8 Low 08:57:09 - 09:13:43 10660
Tonasket 09:06:27 -37.6 Dark Down 24.4 228.7 Low 08:58:10 - 09:14:44 10651
Okanogan 09:06:29 -38.0 Dark Down 24.7 228.7 Low 08:58:12 - 09:14:46 10637
Brewster 09:06:27 -38.3 Dark Down 25.0 228.6 Low 08:58:10 - 09:14:44 10624
Manson/Chelan 09:06:26 -38.6 Dark Down 25.3 228.3 Low 08:58:09 - 09:14:43 10609
Wenatchee 09:06:25 -39.1 Dark Down 25.7 228.3 Low 08:58:08 - 09:14:42 10590
PNWRO 09:06:16 -40.0 Dark Down 25.9 230.1 Low 08:57:59 - 09:14:33 10578
Ellensburg 09:06:24 -39.5 Dark Down 26.1 228.2 Low 08:58:07 - 09:14:41 10571
Yakima 09:06:22 -39.9 Dark Down 26.4 228.3 Low 08:58:05 - 09:14:39 10557
Toppenish/White Swan 09:06:23 -40.0 Dark Down 26.5 228.6 Low 08:58:06 - 09:14:40 10553
Victoria 09:06:36 -38.6 Dark Down 26.4 224.9 Low 08:58:19 - 09:14:53 10549
Goldendale 09:06:20 -40.7 Dark Down 27.0 228.4 Low 08:58:03 - 09:14:37 10524
The Dalles 09:06:20 -41.0 Dark Down 27.4 228.1 Low 08:58:03 - 09:14:37 10506
Maupin 09:06:20 -41.3 Dark Down 27.6 228.4 Low 08:58:03 - 09:14:37 10494
Sisters 09:06:16 -42.3 Dark Down 28.5 228.2 Low 08:57:59 - 09:14:33 10448
Bend 09:06:15 -42.5 Dark Down 28.5 228.6 Low 08:57:58 - 09:14:32 10446
Oregon Observatory 09:06:15 -42.7 Dark Down 28.7 228.5 Low 08:57:58 - 09:14:32 10436
North Lake 09:06:10 -43.1 Dark Down 28.8 229.3 Low 08:57:53 - 09:14:27 10425
Lakeview 09:06:07 -44.0 Dark Down 29.2 230.2 Low 08:57:50 - 09:14:24 10397
Cedarville 09:06:02 -44.6 Dark Down 29.5 230.7 Low 08:57:45 - 09:14:19 10374
Chiloquin 09:06:10 -44.0 Dark Down 29.8 228.7 Low 08:57:53 - 09:14:27 10372
Klamath Falls 09:06:09 -44.3 Dark Down 30.0 228.9 Low 08:57:52 - 09:14:26 10360
Fall River/Burney 09:06:05 -45.3 Dark Down 30.5 229.8 Up 08:57:48 - 09:14:22 10319
Susanville 09:06:00 -45.7 Dark Down 30.5 230.7 Up 08:57:43 - 09:14:17 10313
Tonopah 09:05:44 -46.8 Dark Down 29.9 234.9 Low 08:57:27 - 09:14:01 10298
Reno 09:05:55 -46.3 Dark Down 30.6 231.9 Up 08:57:38 - 09:14:12 10296
Gimple 09:06:00 -46.1 Dark Down 30.8 230.7 Up 08:57:43 - 09:14:17 10294
Greenville 09:05:59 -46.1 Dark Down 30.9 230.6 Up 08:57:42 - 09:14:16 10292
Portola 09:06:00 -46.2 Dark Down 30.8 231.2 Up 08:57:43 - 09:14:17 10290
Yerington 09:05:51 -46.6 Dark Down 30.5 232.7 Up 08:57:34 - 09:14:08 10289
Quincy 09:05:59 -46.3 Dark Down 31.0 230.7 Up 08:57:42 - 09:14:16 10282
Hawthorne 09:05:49 -46.9 Dark Down 30.5 233.4 Up 08:57:32 - 09:14:06 10281
Carson City 09:05:55 -46.6 Dark Down 30.8 232.1 Up 08:57:38 - 09:14:12 10281
Gardnerville 09:05:52 -46.9 Dark Down 30.9 232.2 Up 08:57:35 - 09:14:09 10270
Indian Springs 09:05:35 -47.6 Dark Down 29.7 236.9 Low 08:57:18 - 09:13:52 10266
Henderson 09:05:31 -47.8 Dark Down 29.5 237.7 Low 08:57:14 - 09:13:48 10257
Patrick 09:05:25 -47.9 Dark Down 29.1 238.9 Low 08:57:08 - 09:13:42 10255
Beatty 09:05:38 -47.7 Dark Down 30.2 235.8 Up 08:57:21 - 09:13:55 10254
Lee Vining 09:05:47 -47.6 Dark Down 31.1 233.2 Up 08:57:30 - 09:14:04 10242
Kingman/Dolan Springs 09:05:24 -48.1 Dark Down 29.4 238.8 Low 08:57:07 - 09:13:41 10239
Bishop 09:05:43 -47.9 Dark Down 31.0 234.2 Up 08:57:26 - 09:14:00 10232
Laughlin/Bullhead City 09:05:26 -48.4 Dark Down 29.7 238.4 Low 08:57:09 - 09:13:43 10223
George/Scottsdale 09:05:14 -48.4 Dark Up 28.5 241.3 Low 08:56:57 - 09:13:31 10217
Mohave Valley 09:05:25 -48.6 Dark Down 29.9 238.6 Low 08:57:08 - 09:13:42 10210
Lake Havasu City 09:05:22 -48.9 Dark Down 29.9 239.0 Low 08:57:05 - 09:13:39 10196
Parker 09:05:21 -49.1 Dark Down 30.1 239.1 Up 08:57:04 - 09:13:38 10178
Idyllwild 09:05:26 -50.5 Dark Down 32.0 237.4 Up 08:57:09 - 09:13:43 10092
Yuma 09:05:17 -50.5 Dark Down 31.1 239.6 Up 08:57:00 - 09:13:34 10091
Calipatria 09:05:21 -50.5 Dark Down 31.5 238.7 Up 08:57:04 - 09:13:38 10090
Wildwood 09:05:32 -50.9 Dark Down 33.1 235.6 Up 08:57:15 - 09:13:49 10058

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 531017, (2022/03/25 09:09UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 17.50 127
Alphard        09:27:35.2 -08:39:30  2.0 15.10 124
25 Sex         10:23:26.4 -04:04:27  6.0  1.16 116
PPM 193425     10:26:46.8 -04:23:18  6.6  0.56 115
PPM 193414     10:26:11.6 -04:49:55  9.6  0.14 115
531017         10:26:33.1 -04:56:29 15.9       115
Positions are for J2000

Event circumstances last updated at 2022/02/02 01:09:27 UT

Marc W. Buie, Southwest Research Institute

RECON